The faenza icon theme is pretty well, but the folder-icons-colours are not so nice.
Here I have the blue-theme for folders, which looks much better.
Copy the matefaenza-theme from usr/share/icons into your home-folder .icons and replace the places-folder.
Rename the copied matefaenza-folder into matefaenza-blue or something else.
In settings now is your new blue-folder-theme available.
(The blue folders are from a very good OS, which is R.I.P. , maybe someone know what I mean.)